:root{--navy:#0b2443;--deep:#123966;--blue:#2f80ed;--cyan:#59c7ee;--ice:#eef7ff;--soft:#f7fbff;--white:#fff;--ink:#172033;--muted:#5e6b7a;--line:#dce8f3;--gold:#c9a45c;--shadow:0 20px 55px rgba(11,36,67,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}main section[id],main[id]{scroll-margin-top:90px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#f8fcff,#fff 42%,#f9fcff);line-height:1.78}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1180px,92vw);margin:0 auto}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;background:hsla(0,0%,100%,.92);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid 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